Синтез 5-аміно-4-бензоїл-1,2,4-триазол-3-тіонів як лігандів для визначення важких металів в навколишньому середовищі

Abstract

The main motivation for controlling of heavy metals concentrations in environment (air, water, soil, plants) is its high toxicity. Atomic absorption spectroscopy is one of the most used methods for heavy metals determination. However, the protocols for sample preparation, extraction of heavy metals from probes still need to be improved. The reactions of ionic associations may also be used as organic carriers of heavy metals from samples to laboratory probes. We consider the combination of the dithiocarbamates with aminopolycarboxylic acids as prospective extractants for transferring heavy metal ions into an organic phase. The presented research work is decided to synthesis of 5-amino-4-benzoyl-1,2,4-triazole-3-thiones as prospective extractants for improvement of atomic absorption spectroscopy method for determination of heavy metals in environment. We have synthesized an 5-amino-4-benzoyl-1,2,4-triazole-3-thiones and its derivatives which contains mercapto-group as dithiocarbamates for the formation of strong sulphur-metal covalent bond, carbonyl and amino group for the additional bonds and formation of stable complexes.

The aim of our study was synthesis and investigation of possible complexation of mercapto-group containing heterocyclic compounds with heavy metal ions.